Figure UW-16.1 (j) Weld Configuration - Maximum Size of Opening

[dmorong1]

What is the maximum size of a nozzle opening being welded per the figure in the subject line?

UW-16(d)(1)addresses necks attached by fillet or partial penetration welds but makes no mention of maximum size opening in the vessel.

UW-16(f)(3)(-a)(-2)states:"the maximum size of the opening in the vessel is limited to the outside diameter of the attached pipe plus 3/4 in., but not greater than one-half of the vessel diameter..." but that statement is for standard ANSI/ASME fittings and a different weld configuration.

I can't seem to find any maximum size opening for a nozzle neck into the vessel with a fillet on the outside and partial groove on the inside. Any information would be great, thanks!

 

[SnTMan]

dmorong1, suggest you start reading at UG-36.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[dmorong1]

Thank you Mike! I have read from UG-36 thru UG-43 but did not pick up on anything. I will read again. I understand that the larger hole has an impact on the area required for reinforcement and the area available for reinforcement but my concern is not with that as there is plenty of area available. I'll continue reading.

 

[SnTMan]

Hint: UG-36(b)

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[dmorong1]

I apologize, I think my original post was a bit misleading. What I am driving at is the radial clearance around a nozzle neck. I have a 2" nozzle (2.375" O.D.)and a hole in my vessel that is 2.75" diameter. I'm trying to figure out if there are any rules as to whether the radial clearance between my nozzle O.D. and hole I.D. would be too much.

 

[SnTMan]

Well, that's different. I am not aware of anything in Section VIII, Div. 1 addressing that. It may be governed by weld qualification and / or procedures.

Having said that, 3/16" radial clearance is too much for this size connection, in my opinion. Prefer 1/16".

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[r6155]

I suggest dimension G for sketches(v-1) through (w-2)

Regards
r6155

 

[SnTMan]

Yes, excellent.

The problem with sloppy work is that the supply FAR EXCEEDS the demand